This paper discusses a little known short and unfinished epic poem on the Fourth Siege of Leipzig in 1637 by the Baroque philologist and poet Caspar von Barth (1587–1658). The poem, the autograph of which is preserved at the Ratsschulbibliothek in Zwickau, is shown to be based on a contemporary newspaper account of this event. Whilst it is suggested that the poem’s shortcomings result first and foremost from the poet’s sticking too closely to the historical source, the main part of the discussion explores the various functions and purposes the poem could have been intended to serve.